ANALISI NUMERICO-SPERIMENTALE SUL COMPORTAMENTO A FATICA DI COMPOSITI CARALL RIVETTATI

Nel lavoro è descritto un modello di danneggiamento per provini CARALL (CArbon Reinforced ALLuminium), rivettati e non rivettati, sottoposti a prove di fatica mediante flessione pulsatoria a tre punti in controllo di spostamento. I provini sono realizzati sovrapponendo 8 lamine di tessuto intrecciato di carbonio [0°/90°] e resina epossidica con interposta una lamina in lega di alluminio 6061-T6 dello spessore di 0.8mm. Le prove sono state condotte su provini non rivettati (Tipo 1), su provini con due rivetti disposti simmetricamente ad una distanza d=22 mm dalla mezzeria (Tipo 2) e su provini con 2 rivetti disposti ad una distanza d=44 mm dalla mezzeria (Tipo3). L’analisi dei risultati sperimentali ha mostrato come l’operazione di rivettatura introduca delle microcricche in prossimità del rivetto favorendo la nucleazione e propagazione della delaminazione

Rhabdomyolysis induced by co-administration of fluvastatin and colchicine

A case of fluvastatin-induced rhabdomyolysis after coadministration of colchicine is reported. A 77 year old man with ischemic heart disease, chronic pericardial effusion, diabetes mellitus, dyslipidemia, arterial hypertension, chronic renal failure (stage 2 of classification of chronic kidney disease of National Kidney Foundation) and chronic gout presented with a generalized muscle pain. The patient had been taking 80 mg/day of fluvastatin for 4 years, and, for four weeks before presentation, he had also been taking a dose of colchicine (1.0 mg daily) for an exacerbation of gout. Investigations confirmed the diagnosis of rhabdomyolysis. Discontinuation of fluvastatin and colchicine therapy and adequate fluid administration resulted in the resolution of clinical and biochemical features of rhabdomyolysis. Although neuromuscular adverse effects of fluvastatin and colchicine are well recognized, rhabdomyolysis is rare, making this is only the second case reported of fluvastatin and colchicine co-administration induced rhabdomyolysis in literature

MORPHOLOGICAL ANALYSIS OF ANCIENT GRAPE SEEDS FROM A SINK IN THE MIDDLE-AGE TOWN OF PALERMO

The archaeological excavations in Piazza della Vittoria, in the Roman-Middle Age town of Palermo (Sicily) put in light a sink 3.20 m deep and 1 square m. large, partially filled by thin organic sediments. Grape seeds (grape-stones), fish scales and few vertebrate bones have been found in specific strata sealed under a stratum chronologically attributed to Islamic Middle-Age period (a post-quem limit). The finding of well preserved grape seeds is peculiar and their study opens the opportunity to improve the actual knowledge about evolution, cultivation, use and trade of Vitis L. in the Mediterranean area. This preliminary work focuses on morphologic and morphometric analysis of the ancient grape seeds with two aims: i) systematically describe the remains collection and, ii) define seeds typology and a consequent morphotaxonomic attribution. Over 200 seeds have been carefully dry cleaned (soft brush), photographed and analyzed for total breadth (B), total length (L) and length of stalk (LS) parameters, the most efficient for typological attribution (1, 2); Stummer index has been also calculated (1). Apical notch length (AN) has been for the first time evaluated. Measurements on digital images have been performed using ImageJ 1.31 platform; morphological parameters have been assembled in a dedicated database. Descriptive analysis and linear correlations have been performed using SYSTAT 10. Analysis of variance (ANOVA) and Tukey’s HSD (5% level of significance, α = 0.05) have been applied. All the parameters approximate a normal distribution. Major variation has been observed in LS (c.v. = 35.6%) and AN (c.v. = 35.6%), while B and L showed a c.v. of 9.5% and 12.6% respectively. All the analyzed parameters behave as independent variables with the exception of a significant correlation between Stummer index and L (R2 = 0.45; y = 8.17-0.047x with y = L and x = Stummer index). This correlation reveals that Stummer index depends more from the L and not from the B parameter. On the base of LS measures three subgroups have been arbitrarily created in relationship with the LS: LS1 0.90 mm (35 seeds). Analyzing together the LS groups toward AN, we have found a proportional and significant correlation (p = 0.05) between the extremes LS1 and LS3. In the entire collection, Stummer index varies from 55.76 to 100.86; in the LS groups, the range is 68.38-97.87 in LS1, 61.02-100.86 in LS2 and 55.76-81.70 in LS3. A small group (17) of seeds has been excluded for the impossibility to measure the stalk. The analyzed ancient grape seeds show a wide range of variability for all the considered parameters, revealing a polymorphic collection. In general, the seeds have a rounded heart-like shape, with a noticeable pointy stalk and a very invaginated apical notch. This typical shape is more marked in LS3 group. On the base of LS measures, LS1 is ascribable to wild grapevines, while LS2 and LS3 seem to be ascribable neither to wild nor to cultivated autochthonous Vitis. Furthermore, these seeds differ from those already described in other archaeological horizons in Italy (3) and in France (2). The Stummer index varies highly, exceeding the known range of wild Vitis vinifera (4), although values close to 100 have been already found in wild grapevines in Spain (5) and values above 80 have been also described in Extra-European Vitis species (6). A deep evaluation of the sample, including isotopic analysis and aDNA studies, is in progress. 1) T. T. Korenčič, J. Jakše, Z. Korošec-Koruza (2008) Veget. Hist. Archaeobot., 17(Suppl. 1), S93-S102 2) L. Bouby, I. Figueiral, A. Bouchette, N. Rovina, S. Ivorra, T. Lacombe, T. Pastor, S. Picq, P. Marinval, J. F. Terral (2013) PLoS ONE, 8(5), e63195 3) C. Milanesi, F. Antonucci, P. Menesatti, C. Costa, C. Faleri, M. Cresti (2011) Interdisciplinaria Archaeologica – Natural Sciences in Archaeology, II(2), 95-100 4) A. Stummer (1911) Mitt. Anthropol. Gesellschaft Wien, 41, 283-296 5) F. M. De Toda, J. C. Sancha (1999) Am. J. Enol. Vitic., 50(4), 443-446 6) D. Rivera, B. Miralles, C. Obón, E. Carreño, J. A. Palazón (2007) Vitis, 46(4), 158-16

Safety and efficacy of exercise testing with atropine in patients with recent uncomplicated ST elevation acute myocardial infarction

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TAKO-TSUBO CARDIOMYOPATHY AND THYROID DYSFUNCTION

This work provides important information about the correlation between Tako-Tsubo Cardiomyopathy (TTC) and Thyroid dysfunction (TD). The article gives evidence to how doctors may have to refer to when confronted with a patients with such condiction as thyroid dysfunction and TTC, and the diverse methods that can be used to treat these conditions (TTC with TD)

Biological solutions to aortic root replacement: valve-sparing versus bioprosthetic conduit‡

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Multiplanar strain quantification for assessment of right ventricular dysfunction and non-ischemic fibrosis among patients with ischemic mitral regurgitation

Background: Ischemic mitral regurgitation (iMR) predisposes to right ventricular (RV) pressure and volume overload, providing a nidus for RV dysfunction (RVDYS) and non-ischemic fibrosis (NIF). Echocardiography (echo) is widely used to assess iMR, but performance of different indices as markers of RVDYS and NIF is unknown. Methods: iMR patients prospectively underwent echo and cardiac magnetic resonance (CMR) within 72 hours. Echo quantified iMR, assessed conventional RV indices (TAPSE, RV-S’, fractional area change [FAC]), and strain via speckle tracking in apical 4-chamber (global longitudinal strain [RV-GLS]) and parasternal long axis orientation (transverse strain). CMR volumetrically quantified RVEF, and assessed ischemic pattern myocardial infarction (MI) and septal NIF. Results: 73 iMR patients were studied; 36% had RVDYS (EF<50%) on CMR among whom LVEF was lower, PA systolic pressure higher, and MI size larger (all p<0.05). CMR RVEF was paralleled by echo results; correlations were highest for RV-GLS (r = 0.73) and lowest for RV-S’ (r = 0.43; all p<0.001). RVDYS patients more often had CMR-evidenced NIF (54% vs. 7%; p<0.001). Whereas all RV indices were lower among NIF-affected patients (all p≤0.006), percent change was largest for transverse strain (48.3%). CMR RVEF was independently associated with RV-GLS (partial r = 0.57, p<0.001) and transverse strain (r = 0.38, p = 0.002) (R = 0.78, p<0.001). Overall diagnostic performance of RV-GLS and transverse strain were similar (AUC = 0.93[0.87–0.99]|0.91[0.84–0.99], both p<0.001), and yielded near equivalent sensitivity and specificity (85%|83% and 80%|79% respectively). Conclusion: Compared to conventional echo indices, RV strain parameters yield stronger correlation with CMR-defined RVEF and potentially constitute better markers of CMR-evidenced NIF in iMR